Answer
(a) a rational number
(b) an irrational number
(c) $\frac{a}{b}$
(d) $\frac{c}{d}$
(e) $\frac{a}{b}-\frac{c}{d}$
(f) integers
(g) integers
(h) zero product property
(i) a rational number
Work Step by Step
Answer may vary.
Use method of contradiction, we can find the answers:
(a) a rational number
(b) an irrational number
(c) $\frac{a}{b}$
(d) $\frac{c}{d}$
(e) $\frac{a}{b}-\frac{c}{d}$
(f) integers
(g) integers
(h) zero product property
(i) a rational number